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Swift Skipper Dioptre Repair - HELP!

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/15/2013 at 14:58
riles View Drop Down
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Hi everyone,
My first post, and as is so often the case, I need HELP! I have acquired a nice clean Swift Skipper 7 x 50 model 789 - its an earlyish one with the twist up rigid eyecups - same as Newport, Saratoga & Audubon of the period. All is good except the dioptre is loose - it floats about and although if enough downward  pressure is applied and you keep turning (it doesn`t stop in either direction!) adjustment is possible, you can`t tell  where you actually are. I`ve removed the eyepieces to confirm all this and have started searching for grub screws so I can dismantle and/or tighten the dioptre in the more or less correct position. But.........there are no screws visible anywhere on any surface or ledge....so how was this assembled originally - and how can it be dis-assembled?? 
I have compared this Skipper with a Newport, Saratoga and an Audubon; all four have what is a blind hole in the silver surface exposed when the eyecup is wound up - what on earth was this for? Both the Saratoga and Audubon have tiny screws just visible on the underside of the eyecup, but the Skipper & Newport don`t. Obviously there are manufacturing differences due to different factories - but it doesn`t help me!!

Any thoughts on what has happened and what to do to get the dioptre off and reset? Such a shame if it can`t be done as its a very clean instrument.
Thanks for reading.

riles
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/15/2013 at 17:49
Bird Watcher View Drop Down
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Start by sending an email to Cory Suddarth.
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/16/2013 at 12:14
Klamath View Drop Down
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There is no one in the universe better with Swift Optics than Nicholas Crista of NRC optics.


Actually the solution mat be pretty simple.  Can you post a picture of the diopter adjustment eye piece?  Oftentimes there will be a series of very small screws on the outer ring of that eye piece that can become loosened or lost.  A simple tightening may do the trick.

Too late I see you are in the UK.  It may be difficult to get those shipped over here and back.  Any good repair shop can likely do the deed for you.


Edited by Klamath - November/16/2013 at 12:22
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/18/2013 at 03:33
riles View Drop Down
Optics GrassHopper
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Thank you Bird Watcher and Klamath for repsonding. I`ll try to get a picture posted when I`ve found out how to, but still can`t find any sign of screws on the diopter! I will send E Mails to your recommended names and hope they can suggest something.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/18/2013 at 10:51
tahqua View Drop Down
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An old pair of Bushnell binoculars had a similar problem. I found the screws beneath the eye cups.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/18/2013 at 12:03
riles View Drop Down
Optics GrassHopper
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Joined: November/15/2013
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Hi Tahqua,

The twist-up eyecups on these old Swifts are solid not rubber, and when 'elevated' there is no sign of any screw heads - I`ve used a magnifying glass! That is the frustrating thing, the job should be relatively simple, but how to strip the diopter down is beating me still.
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